First of all, welcome to HWC:) weird, seems like a dead PSU, do some of your friend have a free PSU they can plug in your computer to see what it does? You can also go the a local computer shop and ask the for a PC SPEAKER, the would sell it for 25cent XD if the board make no beep with that it can be PSU or mobo. If it does just report it here and we will tell you what it does mean.